I'm using Thunderbird for Mac.
I just recently discovered that when viewing the message source code of my e-mails (the test e-mail I sent to myself), the header is showing my full computer name, hostname, and my IP.
Regardless if I sent out using Gmail or my ISP's SMTP, the Received: from section of the source code contains all the data I considered personal.
For privacy concern, I would like to hide these info to be sent out in the outgoing e-mails I compose.
How can this be done?